Crank-shaft.



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'HERMANN ERNST RICHTER, OF TUCKAHOE, NEW YORK, ASSIGNOR T0 CHARLES F.

' v v@49.3%SENS, OF YONKERS, NEW YGRK.

'Speeication of Letters Patent.

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Patented Unt. 22, igi.

'Application ilcd November 8, 1916. Serial No. 180,295.

To @ZZ whom t concern Be it known that I, HERMANN ERNST Rion'mma su'bjectof the Emperor of Gel1M many, and resident of-f'luckahoe. in the county of Westchester, State of New `York7 havtinvented certain ner7 and useful iniprovernents in v@rankeShaftsy of which the ollovvingisa specification.` 1 s v The' device, the subject of this invention,

.is arbalanced crank shaft and its objects are toA orovide a shafthavingr means for balancing against the Weight of the crank pin.

Mtv-shaft may `beconstrmted for duplex y multi-cylinder engines or single cylinder en accompanying drawings should be consid-y ered for a complete understanding of the specication which follows:

ln the drawings- Figure 1 shows a completecrank shaft for a Innlticylinder engine.

Fig. 2 shows in elevation an unbalanced disk. i

Fig., 3 shows a balancing-disk. Fig. d shows in section a disk li. Fig. 5 shows in section one of the haianced disks.

Similar reference numerals indicate f like parts in all of thegures Whore they appear.

My crank shaft is provided with a -plurality of bearing or supporting niemhcrs, the

number of which will be determined by the length of the shaitand the number or cylinders in the engine. s ln Fig. l l' have shown end bearing members l i), and an inteny mediate bearing member 3.

Secured to the end o- E the bearing member l is a disk 4:, the periphery or which smooth5 .but itu/ill be noted that upon one face or' the disk d l provide .a projection 5? which extends over a portion of the erip'hery or' the disk. This: projection is 'irectly opposite a perforation into Which I introduce the first crank pin 7.

lt will he noted that the bearing member' l is `introduced linto a central perforation 8 in' the disk d, and that the part of the bearing ineniher which is received in the perform tion-S is not round like a cylinder but that the portion of the end is cut away and I also call attention to thevfact that each crank pin has a portion cut away at each end and that theperforations or holes into 4vviiich the bear` ing; members and the crank pins are to be introduced are not completely circular but are rather irovided with a straight side as gines, and vthe balancing means consists,

trai bearincf member andas each of the balanced dlsks are of similarv construction and each of the unbalanced disks are oi''vsimilar construction I need not enter' into the details of the construction each time that I reifer to one of these members, it bein'gfsuficient to say that' the balanced disks 1i, 1'?, i9 and arenot unlike 'each other, and that the un'liaianced disks ll and 21 are very similar to each other in construction, shape and sise.

ln the central perforation of the disk 17 'l introduce the hearing' member 3 and upon the other end of this member l place another balanced disk i9, havingl a crank pin 2O introdneed in its outermost perforation. An unbalanced disk 21 is arranged upon the crank pin 20 and a second crank pm 22 is engaged in the unfilled perforation in the disk 21. The-forth balanced disk E23 secured to the crankpin 22 and receiving" the outer most bearing-member 2 completes the series as shown, and when assembled as described and when the parte are mechanically secured together 'the result Will be a crank shaft which will rotate in a circle and be found to' pleted crank shaft a small-'portion of one of the projections 15 may be removed or I may remove a slight portion of the balancing disks directly opposite the projection 15, as I provide in everyinstance a sufficient quantity of metal sol that the small necessary parts may be removed Without thevsacrifice of strength.

, In assembling device prefer the parts should be shrunk together, but for greater securty'thepin 24 or key 25 may be intro-v scope of the appended claim, but I desire to i adhere to the number of disks having conm tinuous peripheries and inward projections by means of which a balance is secured.

Having carefully and fully described my invention what` I claim4 is- A crank shaft comprising a plurality of disks arranged in pairs, each said disk provided with a central perforation and a perforation away from the center, and an enlarged portion formed integral with and projecting from one face and 'remote from the center of each said disk, a flat disk between the disks of each pair, said fiat disk being provided with perforations, away from the center thereof, and crank pins and shaft members secured in said disks.v

Signed at New York city, county and State of New York, this 27 day oOct., 1916.

HERMANN ERNST RICHTER. 

